AJ - the Scott name has Brand Value level three (BV3), a border engraved SLE (you didn't mention ejectors or not) is typically Original Quality grade five (OQ5), and the condition sounds like "Shootable but needs some repairs and refinishing", which is Current Condition level six (CC6). For retail of a 12 bore gun similar to this I'd predict BV3-OQ5-CC6 = $1350; less if it is an extractor gun. Is the fact of 8 bore worth a 2.3X premium? 20 bore is worth about 1.5X - 2X premium.
Hope that helps some.
